A system for audio and visual documenting of personal meetings between two or more persons whereby the documentation is stored in a memory means where the access to the memory means can be done only by consent of said participants and by a positive action made by each of them. The system includes a casing, a memory means, a recording voice means or a video recording means, a locking means and authorized keys. The memory means is saved in the casing and locked by the locking means. Opening the locking means and the casing can be done only by using authorized keys. The locking means is a locking means selected from the group consisting of a mechanical locking, an electronic lock, an electric lock, a lock based on magnetic cards, a biometric lock, a locking means based on finger print, retina or DNA sample.